Shock absorber apparatus

Abstract

The present disclosure provides a shock absorber apparatus that includes a bump stopper coupled to a piston rod of a shock absorber. A piston housing comes into contact with the bump stopper when the shock absorber is moved vertically. A support supports a spring surrounding the piston housing. An air cap extends from an upper end of the piston housing to the support so as to cover the piston housing and has an upper surface through which a piston rod passes, a side surface downwardly extending from an end of the upper surface, and an air channel through which compressed air of the bump stopper is guided and discharged to the support.

What is claimed is:  
     
       1. A shock absorber apparatus, comprising:
 a bump stopper coupled to an upper end of a piston rod of a shock absorber; 
 a piston housing configured to come into contact with a lower surface of the bump stopper when the shock absorber is moved vertically; 
 a support having a shape of a flange to surround the piston housing and supporting a lower end of a spring surrounding the piston housing; and 
 an air cap having a shape of a cover extending from an upper end of the piston housing to the support so as to cover the piston housing and having 
 an upper surface through which the piston rod passes, 
 a side surface downwardly extending from an end of the upper surface, and 
 an air channel through which compressed air of the bump stopper is guided and discharged to the support, 
 wherein the upper surface of the air cap has an inlet hole, a diameter of which is larger than a diameter of the piston rod, such that, when the bump stopper is compressed, air in the bump stopper is introduced into the air channel therethrough, and 
 wherein the air channel extends longitudinally from an upper end to a lower end of the air cap. 
 
     
     
       2. The shock absorber apparatus according to  claim 1 , wherein the support has a lower seat supporting the spring, and a lower pad mitigating friction between the lower seat and the spring. 
     
     
       3. The shock absorber apparatus according to  claim 1 , wherein a plurality of air channels are radially separated in the air cap about the inlet hole. 
     
     
       4. The shock absorber apparatus according to  claim 1 , wherein the air channel has a bent section bent from the upper surface toward the side surface, the bent section having a gently curved corner to facilitate air flow. 
     
     
       5. The shock absorber apparatus according to  claim 1 , wherein the upper surface of the air cap has the inlet hole corresponding to an air hole of the bump stopper. 
     
     
       6. The shock absorber apparatus according to  claim 1 , wherein the air cap is composed of a flexible material to resist an impact with the bump stopper.